Preheat your oven to 400°F (200°C) and lightly grease a small oven-safe baking dish.
Heat the olive oil in a small skillet over medium heat, add the fresh spinach, and sauté until it is completely wilted.
In a medium mixing bowl, combine the cooked and shredded chicken breast, Greek yogurt, chopped artichoke hearts, sautéed spinach, garlic powder, sea salt, and black pepper.
Stir the mixture until the ingredients are thoroughly combined and creamy, then transfer it into the prepared baking dish.
Sprinkle the shredded mozzarella and grated parmesan cheese evenly over the top of the mixture.
Bake for 15 minutes until the dip is heated through, then switch the oven to the broiler setting for 1-2 minutes until the cheese is golden and bubbling.
Remove from the oven and let the dish rest for 2 minutes before serving warm.